Does anyone have a gun where for the mag u have cartridges u clip in?? Answered

Do you mean a shotgun with a mag? because once ive made the instructible for my tsg im going to make a: pump action, a lever action, a mag fed, then smgs then finnish my line of assult rifles,maybe i could help, how about i make one and make an instructible on it? i have some ideas for shotguns, i just havent made any yet.

Slugs is what i think you mean. You put one (or two) in, shoot and repeat.

Isn't that the basis of any removable magazine gun?  A good starter would be TD's Basic assault weapon.